Something that gobsmacked me a couple weeks ago while perusing D&C 107, and of which I’m still pondering the significance (or lack thereof):
Technically, scripturally, there’s no such thing as a quorum of deacons, or teachers, or priests, or elders. These groups sit in “council” in groups whose size is scripturally limited; but they are not called “quorums”. Scripturally a “quorum” is a body with authority to govern the church-at-large, and there are only five of them:
—The First Presidency
—The Q12
—A group consisting of all 70s in the Church
—A group consisting of all stake high councilors in the Church
—the high council in “Zion” (originally Missouri and later for a time, IIRC, a specific stake in SLC).